de.innovationgate.utils

Class SkippingIteratorWrapper<T>

java.lang.Object

de.innovationgate.utils.SkippingIteratorWrapper<T>

All Implemented Interfaces:

IteratorWrapper<T>, SkippingIterator<T>, java.util.Iterator<T>

public class SkippingIteratorWrapper<T>
extends java.lang.Object
implements SkippingIterator<T>, IteratorWrapper<T>

A simple skipping iterator wrapper This is just a basic implementation which emulates skipping behaviour via iterating over the next() method. It is for usage at places where a SkippingIterator is needed but the iterator used may not be skipping. If the wrapped iterator is itself a SkippingIterator then its own skip(int) method is used instead of the emulation.

Constructor Summary

Constructors

Constructor and Description
SkippingIteratorWrapper(java.util.Iterator<? extends T> it)

Method Summary

Methods

Modifier and Type	Method and Description
java.util.Iterator<? extends T>	getWrappedIterator()
boolean	hasNext()
T	next()
void	remove()
int	skip(int nrOfElements) Will skip the given number of elements in the queue.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SkippingIteratorWrapper

public SkippingIteratorWrapper(java.util.Iterator<? extends T> it)

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<T>

next

public T next()

Specified by:

next in interface java.util.Iterator<T>

remove

public void remove()

Specified by:

remove in interface java.util.Iterator<T>

skip

public int skip(int nrOfElements)

Description copied from interface: SkippingIterator

Will skip the given number of elements in the queue. The next call of the Iterator.next() method will return the element immediately after the last skipped one. Must be called before any iterating methods (Iterator.next() Iterator.hasNext()) have been used. Otherwise an IllegalStateException is thrown.

Specified by:

skip in interface SkippingIterator<T>

Parameters:

nrOfElements - Number of elements to skip

Returns:

The number of skipping iterations that could not be performed because the iterator reached the end. Should be 0 when the iterator was able to complete all operations without reaching the end.

getWrappedIterator

public java.util.Iterator<? extends T> getWrappedIterator()

Specified by:

getWrappedIterator in interface IteratorWrapper<T>